Abstract: The Kudo method for obtaining average pressures in some axisymmetric forming problems by the use of velocity fields having conical surfaces as discontinuity surfaces is reviewed in the paper. ...

Abstract: The two developments in the upper-bound method are given. These are an extended treatment of the velocity field for outward flow of a cylindrical deforming region, and the introduction of a ...

Abstract: Experiments were conducted involving the upsetting of solid cylinders and rings of annealed SAE 1040 steel at room temperature for various end conditions. Measurements were made on the displacement ...

Abstract: Steel S.A.E. 1112 cold rolled specimen was cut orthogonally at slow speed of 0.625 ipm, and the shear plane formation was examined from a series of photographs taken during a cut for cutting ...

Abstract: Three-dimensional rigid-plastic finite element method was used to analyze the practice of open-die block forging, focusing on the effects of die configurations and forging pass designs. Four ...

Abstract: The regular upper-bound approach in metal-forming processes is extended to time-dependent processes. The ultimate goal is to estimate, in an approximate manner, time rate effects such as machine ...

Abstract: In the process of the deep drawing of a cup, anisotropy and work-hardening characteristics of the material were introduced, by use of the incremental strain theory, into the calculation of ...

Abstract: The workability of aluminum alloy 7075-T6 was investigated in upsetting and rolling at room temperature with reference to occurrence of free-surface cracks. The fracture criterion was established ...